return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CHBrCHBr (Ethene, 1,2-dibromo-, (Z)-)

using model chemistry: B3PW91/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at B3PW91/cc-pVTZ
 hartrees
Energy at 0K-5225.810382
Energy at 298.15K-5225.818018
HF Energy-5225.810382
Nuclear repulsion energy428.589009
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3PW91/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3223 3099 0.10      
2 A1 1642 1579 33.96      
3 A1 1176 1131 1.45      
4 A1 597 574 7.86      
5 A1 106 102 0.04      
6 A2 906 872 0.00      
7 A2 387 373 0.00      
8 B1 688 661 61.98      
9 B2 3201 3078 17.16      
10 B2 1282 1233 43.88      
11 B2 769 740 65.41      
12 B2 481 463 2.36      

Unscaled Zero Point Vibrational Energy (zpe) 7228.7 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 6951.2 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3PW91/cc-pVTZ
ABC
0.29078 0.03356 0.03009

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.661 1.241
C2 0.000 -0.661 1.241
Br3 0.000 1.760 -0.275
Br4 0.000 -1.760 -0.275
H5 0.000 1.210 2.173
H6 0.000 -1.210 2.173

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32271.87252.85681.08112.0904
C21.32272.85681.87252.09041.0811
Br31.87252.85683.51972.50893.8487
Br42.85681.87253.51973.84872.5089
H51.08112.09042.50893.84872.4201
H62.09041.08113.84872.50892.4201

picture of Ethene, 1,2-dibromo-, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br4 125.921 C1 C2 H6 120.500
C2 C1 Br3 125.921 C2 C1 H5 120.500
Br3 C1 H5 113.579 Br4 C2 H6 113.579
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.141      
2 C -0.141      
3 Br -0.009      
4 Br -0.009      
5 H 0.150      
6 H 0.150      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.672 1.672
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.093 0.000 0.000
y 0.000 -48.338 0.000
z 0.000 0.000 -42.446
Traceless
 xyz
x -4.702 0.000 0.000
y 0.000 -2.068 0.000
z 0.000 0.000 6.770
Polar
3z2-r213.540
x2-y2-1.756
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.289 0.000 0.000
y 0.000 12.207 0.000
z 0.000 0.000 8.749


<r2> (average value of r2) Å2
<r2> 287.534
(<r2>)1/2 16.957